JPH04647B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pine core material used for bed pinerests, sofas, etc., and a method for manufacturing the same.

[Conventional technology and its problems] Conventionally, many mats have been used that are equipped with a large number of coil springs with the thickness direction oriented in the axial direction inside a filling made of synthetic resin sponge or cotton. In the case of such a mat, since the axial direction of the coil spring is the pressure receiving direction, the elastic deformation of the coil spring becomes large and the elastic force is too high for the mat.

Therefore, the present applicant first arranged a required number of supports in which a coiled elastic body was wound spirally around a synthetic resin sponge cylinder inserted through a metal core in the center, and covered them with a synthetic resin sponge layer. He proposed a new matsutō (Utility Application No. 61-99529).

In this mat, since the radial direction of the elastic body is the pressure receiving direction, excessive elastic deformation can be suppressed, but the following problems can be raised.

Since the direction in which the coil spring is further spirally wound around the cylindrical body is constant, when a person stands on the pine, the direction in which the pine sinks and the direction in which it sways is biased towards a certain lateral direction. I feel an uncomfortable sensation as if I were slipping off a pine tree.

In addition, in the process of manufacturing the mat, a cylindrical body is first manufactured separately, and then a coil spring is wound around this cylindrical body, which increases the number of manufacturing steps.
It is difficult to spirally wind a coiled elastic body around a cylindrical body of synthetic resin sponge.

The present invention provides a pine core material that solves the above-mentioned problems, and also provides a simple method for manufacturing this pine core material.

[Means for Solving the Problems] In the pine core material of the first invention of this application, a plurality of elastic bodies formed by winding coil springs in a spiral shape are arranged side by side inside a foamed synthetic resin. This is a core material of a pine which is made by embedding it, and is made by alternately arranging one to a plurality of two kinds of elastic bodies each having a spiral winding direction of right-handed and left-handed.

The second invention of this application is a method for manufacturing the pine core material of the first invention, which comprises: One to several pieces are alternately placed in parallel with their axial directions laid sideways and set in a predetermined position in a foam molding mold, and then a foaming resin stock solution is supplied to the mold to perform foam molding. The elastic body is embedded and integrated into a synthetic resin.

[Function] The core material of the pine according to the first invention is such that when a person stands on the pine, a load is applied in the radial direction of the elastic body, the amount of elastic deformation is small, there is no excessive sinking, and Good restorability. Furthermore, since the elastic bodies whose helical winding directions are right-handed and left-handed are arranged alternately in parallel, the directions in which the elastic bodies tend to deform due to the load cancel each other out.
The degree of sinking of the pine becomes uniform throughout.

In the second invention, a method for manufacturing pine core material, the elastic material can be integrally embedded in the foamed synthetic resin by simply setting the elastic material in a mold, pouring the foaming resin stock solution, and foaming it. can be easily manufactured.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

Reference numeral 10 denotes a bed mat, and this mat 10 has a core material 12 and an exterior body 14 provided around the outer periphery thereof.

The core material 12 is a single elongated coil spring 18.
A coiled elastic body 16 formed by spirally wrapping
is laid down and buried inside a sponge layer 20 made of foamed synthetic resin. There are two types of spiral winding directions of the elastic body 16: right-handed and left-handed, and these two types of right-handed elastic bodies 16a and left-handed elastic bodies 16b are alternately arranged one by one inside the sponge layer 20 in parallel. I'm letting you do it. This elastic body 16 has elastic force in both the axial direction and the radial direction.

A method of manufacturing the core material 12 of the pine 10 will be described below.

After one coil spring 18 is spirally wound rightward, it is hardened and shaped to produce a right-handed elastic body 16a. Similarly, left-handed elastic body 16
b is also manufactured.

As shown in FIG. 3, a right-handed elastic body 16a and a left-handed elastic body 16b are placed in a bottomed formwork 22 that is substantially rectangular in plane.
Lay it on its side and set one to several pieces alternately.

In this embodiment, the right-handed elastic bodies 16a and the left-handed elastic bodies 16b are alternately arranged one by one at appropriate intervals in parallel, 5 pieces each, for a total of 10 pieces. In this case, a cubic holding stand 2 made of the same material as the sponge layer 20 is placed at an appropriate interval on the bottom of the formwork 22.
A plurality of elastic bodies 16 are placed on top of the elastic body 16.
This holding stand 24 forms a space between the bottom 26 of the formwork 22 and the elastic body 16, as shown in FIG.

After arranging the elastic bodies 16, as shown in FIG.
are connected by a plurality of connecting members 30 at appropriate intervals in the length direction. In addition, 10 elastic bodies 16a,
The ends of the elastic bodies 16b are also connected by the connecting member 32 so that the distance between the elastic bodies 16a, 16b is always constant, so that the ten elastic bodies 16a, 16b are connected in the radial direction.
That is, the mat 10 is made to expand and contract only in the thickness direction.

The method of connecting the elastic bodies 16a, 16b is not limited to the above-mentioned means. For example, although not shown, the ends of 10 elastic bodies 16a, 16b are connected to each other with a connecting member, and the ends of 10 elastic bodies 16a, 16b are connected with each other using a rod-shaped connecting member. Book elastic body 16
The radial upper and lower ends of a and 16b may be tied together. Other methods include swingably connecting the elastic bodies 16a and 16b with a plurality of metal rings, or clamping the upper and lower parts of the 10 elastic bodies 16a and 16b with two nets. It is also possible to do this.

The arrangement of the elastic bodies 16a, 16b is not limited to the above embodiment. For example, in the case shown in the figure, the elastic bodies 16a, 16b are lined up one row at a time in the width direction of the core material 12. , 16b may be arranged alternately, or alternatively, the elastic bodies 16a, 16b may be arranged alternately parallel to the diagonal direction of the core material 12.

After connecting the elastic bodies 16a and 16b, the mold 22 is covered with a lid 28. The lid 28 has an inlet 34 for supplying the foamable resin stock solution and a plurality of air holes 36.

As shown in FIG. 6, after putting on the lid 28, the necessary amount of foaming resin stock solution is poured into every corner of the mold 22 through the supply port 34 to cause foaming, and the foamed sponge and elastic body 16a are , 16b are integrated to form the sponge layer 20. Holding stand 2
4 to form a space between the elastic bodies 16a, 16b and the bottom 26 of the formwork 22, the elastic bodies 16a, 16b are completely covered with the foamable resin stock solution. After doing this, as shown in FIG. 7, the core material 12 is taken out from the formwork 22.

The foamable resin stock solution forming this sponge layer 20 may be a mixture of a compound having two isocyanate groups, such as toluene diisocyanate, and a polyhydric alcohol compound, such as polypropylene alcohol, and when this is foamed, it becomes polyurethane. form is obtained.

Note that, as in the above embodiment, the formwork 22 is closed to the lid 28.
It is not necessary to close the mold and foam it. In this case, the excess sponge layer 20 protruding upward from the mold 22 is cut off to adjust the shape.

Although not shown, the elastic bodies 16a and 16b
A structure may also be employed in which another elastic body is buried between the elastic bodies 16a and 16b in parallel with the elastic bodies 16a and 16b.

The exterior body 14 that covers the core material 12 has an inner filling layer 3.
8 and a quilting layer 40, and the stuffing layer 38 is made of laminated layers of palm hair, cotton, kapoku, foam rubber, urethane foam, etc. Moreover, the quilting layer 40 is made of synthetic cotton,
It is used to store feathers, etc.

Due to the synergistic effect of the elastic bodies 16a and 16b, the synthetic resin sponge layer 20, and the exterior body 14, the mat 10 has appropriate elasticity that is neither too hard nor too soft, and has elasticity that conforms to the body. gaining sex.

When a person stands on the mat 10 and a downward force is applied, the load is applied in the radial direction of the elastic bodies 16a and 16b, so the amount of elastic deformation is small, there is no excessive sinking, and the recovery is improved. It is in good condition and there is little lateral vibration. Furthermore, since the elastic bodies 16a and 16b whose helical winding direction is right-handed and left-handed are alternately arranged in parallel, the elastic bodies 16a and 16b due to the load,
The directions in which the mat 16b attempts to deform cancel each other out, and the degree of sinking of the mat 10 becomes uniform as a whole, so that a person riding on the mat 10 does not feel uncomfortable.

Regarding the manufacturing method of the core material 12 of the pine 10,
By simply setting the elastic bodies 16a, 16b in the formwork 22, pouring the foaming resin stock solution and foaming, the elastic bodies 16a, 16b can be integrally embedded in the foamed synthetic resin, and the core material 12 can be manufactured easily, reducing manufacturing costs. is low, and Matsuto 10 can be mass-produced at low cost.

In the above embodiment, the mat 10 of a bed was described, but the present invention is not limited to this, and the present invention may be used for the core material 12 of a pillow, a mat of a sofa, etc.

[Effects of the Invention] The pine core material of the first invention has appropriate elasticity that is neither too hard nor too soft due to the synergistic effect of the elastic body and the synthetic resin sponge layer. It has obtained elasticity in line with the above. Also,
When a person stands on the mat and a downward force is applied, the load is applied in the radial direction of the elastic body, so the amount of elastic deformation is small and there is no excessive sinking, and it has good restorability and lateral There is less shaking. Furthermore, since the elastic bodies whose helical winding direction is right-handed and left-handed are alternately arranged in parallel, the directions in which the elastic bodies try to deform due to the load cancel each other out, and the degree of sinking of the pine is reduced as a whole. become uniform,
A person sitting on the mat does not feel uncomfortable.

Regarding the second invention, a method for producing pine core material, the elastic material can be integrally embedded in the foamed synthetic resin by simply setting the elastic material in a mold, pouring the foaming resin stock solution, and foaming it. can be easily manufactured,
Manufacturing costs are low, and pine can be mass-produced at low cost.

[Brief explanation of drawings]

Fig. 1 is a partially sectional plan view showing an embodiment of the present invention, Fig. 2 is a partially enlarged vertical sectional view, and Figs. 3 to 7 are explanatory diagrams showing a method for manufacturing a pine core material. Fig. 3 is a perspective view of the elastic body set in the formwork, Fig. 4 is a plan view of the elastic body set in the formwork, and Fig. 5 is a perspective view of the elastic body set in the formwork. Figure 6 is a vertical cross-sectional view of the set state, Figure 6 is a vertical cross-sectional view of the mold with the lid on and the foaming resin stock solution poured in, and Figure 7 is a vertical cross-section of the mold with the core material removed from the mold. It is a diagram. Explanation of symbols, 10...pine, 12...core material,
16a...Right-handed elastic body, 16b...Left-handed elastic body, 18...Coil spring, 20...Sponge layer, 22...Formwork.

Claims (1)

[Scope of Claims] 1. A pine core material made by embedding a plurality of elastic bodies formed by winding coil springs in a helical shape and burying them side-by-side inside a foamed synthetic resin, which is a spirally wound body. A pine core material characterized in that one to a plurality of two types of elastic bodies each having a right-handed winding direction and a left-handed winding direction are alternately arranged. 2. Two types of elastic bodies made by winding a coil spring spirally in a right-handed and left-handed manner are arranged in parallel with the axial direction of the elastic bodies alternately laid sideways in groups of one or more, and placed in a predetermined position in a foam molding form. 1. A method for manufacturing a pine core material, characterized in that the elastic body is embedded in the foamed synthetic resin and integrated with the foamed synthetic resin by supplying a foaming resin stock solution to the mold and performing foam molding.